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- There is a latex formula in the documentation of the [covarPop](https://clickhouse.com/docs/en/sql-reference/aggregate-functions/reference/covarpop) method, which is quite similar to varPop method. - In Russian docs there are formulas both for [varPop](https://clickhouse.com/docs/ru/sql-reference/aggregate-functions/reference/varpop), and [covarPop](https://clickhouse.com/docs/ru/sql-reference/aggregate-functions/reference/covarpop). Therefore, for consistency, it is suggested to add formula here too.
903 B
903 B
| title | slug | sidebar_position |
|---|---|---|
| varPop | /en/sql-reference/aggregate-functions/reference/varPop | 210 |
varPop
Calculates the population variance:
\frac{\Sigma{(x - \bar{x})^2}}{n}
Syntax
varPop(x)
Alias: VAR_POP.
Parameters
Returned value
- Returns the population variance of
x.Float64.
Example
Query:
DROP TABLE IF EXISTS test_data;
CREATE TABLE test_data
(
x UInt8,
)
ENGINE = Memory;
INSERT INTO test_data VALUES (3), (3), (3), (4), (4), (5), (5), (7), (11), (15);
SELECT
varPop(x) AS var_pop
FROM test_data;
Result:
┌─var_pop─┐
│ 14.4 │
└─────────┘